主动振动控制的有限元分析

Active Vibration Control Using Finite Eelement Method Strategy

主动振动控制进行理论计算时,往往将体系简化为单自由度或多自由度,不能准确反映实际工程结构的真实状态。首先进行LQR主动振动控制解析计算,得到主动控制器;随之进入ANSYS/APDL环境,对振动控制体系进行有限元建模;再将主动控制器输入设计的主动振动控制程序,以对体系开展主动振动控制的有限元分析。结果表明,有限元法能够较好地实现主动振动控制,为实际工程结构的主动振动控制提供了一种有效的计算途径。

The theoretical calculation of active vibration control often simplifies the system to single degree or multiple degrees of freedom and thus the true state of the actual engineering structure cannot be reflected.The linear quadratic regular(LQR)active vibration control was carried out firstly as an analytical calculation,instantly the active controller was obtained,and then ANSYS/APDL was resorted to and finite element modeling for the vibration control system was performed,and the analytical active controller was imported into the designed active vibration control program in ANSYS/APDL environment,and the finite element analysis of active vibration control was achieved.The results showed that active vibration control using finite element method(FEM)strategy was feasible by which an effective calculation strategy for active vibration control of practical engineering structures was presented.